They have been more careful in what coins or tokens they offer to their user base compared to other exchanges and custodial wallets. I also read that it wasn't that easy to implement Doge chain before and it seems the devs have made some improvements so Coinbase had it easier this time.
They can still make a lot of profit from the addition of Doge. Elon is planning something.
Indeed Elon is either planning something big or he might create a carter in the crypto industry that might never get filled. Imagine if Elon dumps all the doge coins he has and at some point, he will, no way one of the smartest investors would keep holding them for a lifetime. Whenever he dumps the doges I can only imagine the mayhem that would follow on the exchanges and some might even shut down and crash. There would be chaos on twitter and I am just curious how things pan out.
It looks like even this news affected the price positively. Because we are seeing it at $0.49 right now. After Dogecoin is listed on Coinbase, I think we will see the price increasing to a level which is close to its ATH.
More exchanges mean more volume and hence better price so yeah getting listed on new exchanges especially as big as Coinbase is surely going to help the price. But all this drama might be over relatively soon, I suspect.